Ar-ah-BELL-a. First syllable definitely not like "air"-- more just like saying the letter "r", following by ah-BELL-ah. First syllable rhymes with "car". I'm from the East Coast, if that makes a difference.

It's dependent on the dialect you speak. Everything listed is correct, it's just a regional difference, like how some people pronounce Cara "CAIR-a," some say "CAH-ra" (like the beginning of "cat") and some say "CAR-a." I use the second pronunciation, you can pick whichever you like best. It's really not a very difficult name, I don't think.